Affiliate from Form

I have a landing page for a specific product and affiliate that uses a different domain name. http://www.wisdomfilms.com/voiceforhope/ I am using the form code as below to try and pass the order and affiliate id to the cart (login would be even better). I don't want them to go to the product page as the affiliate link normally works. The quantity and the product both work but it doesn't appear to be reading the affiliate ID. I looked at the code in instPrd.asp and it appears to check for an affiliateid through pcStartSession.asp  Is what I am doing possible? Should this be working? Should I pass the idaffiliate as pidaffiliate?  Is there another way to track these affiliate sales? Does anyone know? Thanks

 

<form method="post" action="instPrd.asp"  name="additem">

<input name="quantity" type="text" value="1" size="2" maxlength="2" />

<input name="idproduct" type="hidden" value="71" />

 

 

I am a complete newbie to asp and product cart so I appreciate the help. It would be much easier for me in php or if I had built the store from scratch.

 

This is what I am thinking, on pcStartSession.asp after it checks for a querystring,  I add this?

If session("idAffiliate")=1 then
               pcInt_IdAffiliate = request.form("idAffiliate")
    if validNum(pcInt_IdAffiliate) then
     session("idAffiliate")=pcInt_IdAffiliate
    else
     session("idAffiliate")=1
    end if
   End if

 

 Hmmm will instPrd.asp hold/pass the form variable while it runs pcStartSession.asp or maybe I should add this to the top of instPrd.asp and just establish the session variable then. Any suggestions?

Thanks again